The perceived naturalness of real and synthesized bassoon vibrato sounds is investigated in a listening test. The stimuli were generated by means of a currently developed synthesis and analysis framework for wind instrument sounds, based on the pulse forming theory. The framework allows controlling amplitude and frequency parameters at many different stages during the sound production process. Applying an ANOVA and Tukey HSD test it could be shown that timbre modulation (a combined pulse width and cycle duration modulation) is an important factor for the perceived naturalness of bassoon vibrato sounds. Obtained results may be useful for sound synthesis as well as in the field of timbre research.
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